**(c)**        All of Lessee’s maintenance procedures shall be undertaken and completed in accordance with the manufacturer’s recommended
procedures, and by properly trained, licensed, and certificated maintenance sources and maintenance personnel, so as to keep the Aircraft, each engine and every component and system of each: (i) in as good operating condition as when delivered
to Lessee hereunder, ordinary wear and tear excepted, and (ii) in such operating condition as may be necessary to enable the FAA Standard Airworthiness Certificate (and any other applicable certificate, license, 


  


4.